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17 October 2014

20 December 2013

  • curprev 21:5621:56, 20 December 2013 en>Ebony Jackson 22,284 bytes +22,284 Basic properties: Extension is backwards. (An extension of A by B means that B is the subobject and A is the quotient.) Some corrections needed over non-algebraically closed fields.

7 May 2012